: 垫黑
印刷测量垫白垫黑技术点参考(EN)
The following white backings correspond to ISO 13655:2009 as quoted further down
Gretag/Macbeth SpectroScan with white backing
Two sheets ColorGate "ISOProof 270 g"
Two sheets CGS "ORIS PearlPROOF Super"
Two sheets "RP271 S Satin 270 g